Resolved You cannot send emails from Plesk because outbound connections on TCP port 587 is blocked

[klowet]

Hi

In 'Server-Wide Mail Settings' I get the warning:

You cannot send emails from Plesk because outbound connections on TCP port 587 is blocked. Check the firewall settings or contact your hosting provider.

But 587 TCP outgoing is open:

[root@nwave-prd-web05 klowet]# telnet smtp.gmail.com 587
Trying 64.233.166.109...
Connected to smtp.gmail.com.
Escape character is '^]'.
220 smtp.gmail.com ESMTP i2sm19591963wmb.28 - gsmtp

In panel.ini, the default settings are still active, see attachment.

Product version: Plesk Obsidian 18.0.23.4
OS version: CloudLinux 7.7 x86_64
Build date: 2020/02/06 14:00
Revision: 6a5bd1208852d9cc63e7c2099f18709b1f2e7852

 

[IgorG]

The error you see in Plesk UI is false-positive, the port is being checked only on installation and then the message is not updated.
We have a bug PPPM-11528 to fix in the future.

 

[klowet]

Great. At installation time, the port was indeed closed.

 

[Dmytro]

Hi, I see it's fixed "The check on SMTP ports 25 and 587 can no longer return false-positive results. (PPPM-11528)" in Plesk Obsidian 18.0.25 17 March 2020
But I'm using my server for a couple months and I saw this error today
I have no any problem with sending email from server and also I can connect to and from server using port 25 and 587
I tried to click "recheck" - but no luck

Ubuntu 22.04.4 LTS , Plesk Obsidian 18.0.58 upd 1 (ARM64)

Should I just close it?

https://imgur.com/ihV4M30

 

[Peter Debik]

If port 25 is open you can close the message.